Points from Foregoing Letters


    FROM combined X-ray and chemical evidence, W. T. Astbury and Florence O. Bell put forward a model for the molecular structure of the fibres of the collagen group. The average length per amino-acid residue in the direction of the fibre axis is about 2.85, and the intramolecular pattern requires no fewer than 288 residues in a row. Owing to the high content of proline and hydroxyproline the polypeptide chains are partly in a cis-configuration, as opposed to the rather longer trans-configuration of the β-proteins.

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    Points from Foregoing Letters. Nature 145, 429 (1940). https://doi.org/10.1038/145429b0

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